package com.wb.config;

import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;

import java.nio.charset.Charset;

@Configuration
public class HttpMessageConverterConfig {

    private final Logger logger = LoggerFactory.getLogger(HttpMessageConverterConfig.class);

    @Bean(name = "fastJsonConfig")
    public FastJsonConfig fastJsonConfig() {
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        SerializerFeature[] serializerFeatures = new SerializerFeature[]{
                //    输出key是包含双引号
                SerializerFeature.QuoteFieldNames,
                //    是否输出为null的字段,若为null 则显示该字段
//                SerializerFeature.WriteMapNullValue,
                //    数值字段如果为null，则输出为0
                SerializerFeature.WriteNullNumberAsZero,
                //     List字段如果为null,输出为[],而非null
                SerializerFeature.WriteNullListAsEmpty,
                //    字符类型字段如果为null,输出为"",而非null
                SerializerFeature.WriteNullStringAsEmpty,
                //    Boolean字段如果为null,输出为false,而非null
                SerializerFeature.WriteNullBooleanAsFalse,
                //    Date的日期转换器
                SerializerFeature.WriteDateUseDateFormat,
                //    循环引用
                SerializerFeature.DisableCircularReferenceDetect,
        };
        fastJsonConfig.setSerializerFeatures(serializerFeatures);
        fastJsonConfig.setCharset(Charset.forName("UTF-8"));
        return fastJsonConfig;
    }

    @Bean
    public HttpMessageConverters fastJsonHttpMessageConverters(
            @Qualifier("fastJsonConfig") FastJsonConfig fastJsonConfig) {
        FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();
        fastConverter.setFastJsonConfig(fastJsonConfig);
        HttpMessageConverter<?> converter = fastConverter;
        return new HttpMessageConverters(converter);
    }
}
